Holley HP EFI conversion
12-14-2020 | 08:40 AM
#91
Thread Starter
Registered
Joined: Jan 2003
Posts: 6,018
Likes: 1,521
From: Grand Rapids, MI
I had/have a hard time believing the standard settings in holleys system would kill GM coils, but I seen it happen. Would have been cool if guy had the good holley coils like you to try. Ive heard from people who been to holley training that their traininng rep told them a certain GM /mercuiser coils were the very best ones. Ive heard the holley coils can easily take 6.5 MS of dwell, would be interesting IF you dyno your motors if upping the dwell to 5.5, 6.5 will do anything for fuel burn/hp past the 4.5 your at , Smitty
My default dwell table that I setup last night was 1.5ms.
Last edited by Rookie; 12-14-2020 at 08:44 AM.
12-14-2020 | 09:03 AM
#94
Registered
Joined: May 2007
Posts: 292
Likes: 60
From: Stuart, fl
......behind that monster.......
12-14-2020 | 10:03 AM
#97
Registered
Joined: Jun 2009
Posts: 9,968
Likes: 6,456
From: Chicago
Tuning knock sensors to a particular engine is key for not retarding and burning the thing down right? I haven`t really looked into it .
I`m running a stand alone knock sensor , nothing tuned to my engine but when I dynoed most it would hit was 78 . in boat it hardly gets past 35.
It`s more of a dummy gauge .. if I see more than 35 I know something is up.
I`m running a stand alone knock sensor , nothing tuned to my engine but when I dynoed most it would hit was 78 . in boat it hardly gets past 35.
It`s more of a dummy gauge .. if I see more than 35 I know something is up.
12-14-2020 | 10:11 AM
#98
Registered
Joined: Apr 2004
Posts: 1,268
Likes: 239
From: Michigan
had to go to a different dyno and use all my stuff..
12-14-2020 | 10:28 AM
#99
Registered
Joined: May 2007
Posts: 292
Likes: 60
From: Stuart, fl
to set the knock freq and sensitivity tables you really need to run on engine dyno and get timing set for mbt and if you can get a set of cylinder pressure sensors and get a good clean timing table the motor and then you can force a little knock and set the sensors off those readings there is no one setting that works for all, every engine/boat is different, its just a microphone that listens so piston rattle valve trail noise, exhaust drone can all register on it, ive seen some secondary harmonics show up on them. like icdedppl said just keep and eye on what the normal feedback looks like and when you start to see something different thats when you know somethings going on
12-14-2020 | 10:37 AM
#100
Thread Starter
Registered
Joined: Jan 2003
Posts: 6,018
Likes: 1,521
From: Grand Rapids, MI
I have the sensors and will have it hooked up on the dyno. Like others have stated it is all engine specific. Hopefully I can data log during the dyno and then just set to known good and look for anomalies.
